Sigma DE2-70 Manuel D’Utilisation

 

DE2-70 User Manual

 

57 

 

 
 

The pin assignments of the associated interface are listed in Table 5.18. 

 

IRDA_TXD

IRDA_RXD

VCC33

VCC33

R42

120

R42

120

R41

120

R41

120

U6

IrDA

U6

IrDA

AGND

4

VCC

3

NC

2

GND

1

SD

5

RXD

6

TXD

7

LEDA

8

SHIELD

9

R43

47

R43

47

 

Figure 5.21.  IrDA schematic. 

 

IRDA_TXD PIN_W21 

IRDA 

Transmitter 

IRDA_RXD PIN_W22 

IRDA 

Receiver 

Table 5.18.    IrDA pin assignments. 

 

 

The DE2-70 board provides a 2-Mbyte SSRAM, 8-Mbyte Flash memory, and two 32-Mbyte 

SDRAM chips. Figures 5.22, 5.23, and 5.24 show the schematics of the memory chips. The pin 

assignments for each device are listed in Tables 5.19, 5.20, and 5.21. The datasheets for the memory 

chips are provided in the Datasheet/Memory folder on the DE2-70 System CD-ROM.